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Assignment 12, Continued - 14081_642
Assignment 12, Continued - 14081_644

Equipment Operator Basic - Beginning construction equipment operators manual
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12-24. When computing plant-mix materials, you use what pound value to represent the approximate weight of 1 cubic foot of compacted hot-mix asphalt? 1. 80 pounds 2. 100 pounds 3. 120 pounds 4. 146 pounds 12-25. When you are performing asphalt hand spreading operations, what problem can result if you throw the material a long distance or dump it from too great a height? 1. The hot-mix will cool too fast 2. The  hot-mix  will  splatter  all over the place 3. The hot-mix will segregate 4. The hot-mix will fail to bind with the mix placed on the ground 12-26. What is the most important phase of flexible pavement construction? 1. Compaction 2. Mixing 3. Paving 4. Transporting 12-27. What is an advantage of mixed-in– place   construction? 1. It takes less time and skill to work with 2. It  retains  a  higher  road- bearing  ratio 3. The  aggregate  is  already on  the  roadbed  or  available from  nearby  source 4. The asphalt is less expensive and can be laid in cold weather 12-28. A  single  layer  of  road-mix pavement normally has what thickness,   in  inches? 1. 1/2 to 1 2. 1 to 1 1/2 3. 1 1/2 to 3 4. 3 1/2 to 4 1/2 12–29. “Surface  moisture”  is  defined  as 1. the depth of puddling water 2. the film of water around each particle of stone or sand 3. the  estimated  number  of gallons of water a road surface  can  hold 4. the  amount  of  moisture  that collects on a road surface during  early  morning  hours 12–30. A uniform mix controls the rate of  travel  and  mixing  operation of a travel mix plant. 1. True 2. False 12-31. When  performing  blade–mixing operations,  you  should  apply  what total  number  of  equal  applications of bitumen with a bituminous distributor? 1. Two 2. Three 3. Four 4. Five 12–32. The  bituminous  mix  should  be spread when the surface is damp or when the mix itself contains an excessive amount of moisture. 1. True 2. False Learning  Objective: Recognize the  defects  and  techniques  of repairing  flexible  pavements. 12–33. Which  of  the  following  types of surface cracks is caused by excessive  movement  of  the  surface over  unstable  subgrades  or  base courses? 1. Alligator 2. Edge 3. Reflection 4. Slippage 91







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